The charge-transfer spectra of the heteronuclear rare gas ions have been studied $previously.^{1}$ Furthermore, rotational analyses have been accomplished for (HeNe)$^{+2}$ and (HeAr)$^{+}.^{3}$ Nevertheless, the spectra due to the heavier ions are not well understood. New resolved spectra of the charge-transfer transitions of the rare gas ions (ArKr)$^{+}$ and (ArXe)$^{+}$ are presented. The spectra were obtained from a D.C. discharge in a supersonic jet.